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a3bcde70 HT |
1 | /** @file\r |
2 | Dhcp6 support functions implementation.\r | |
3 | \r | |
c413813d | 4 | (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>\r |
f75a7f56 | 5 | Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>\r |
a3bcde70 | 6 | \r |
ecf98fbc | 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
a3bcde70 HT |
8 | \r |
9 | **/\r | |
10 | \r | |
11 | #include "Dhcp6Impl.h"\r | |
12 | \r | |
13 | \r | |
14 | /**\r | |
15 | Generate client Duid in the format of Duid-llt.\r | |
16 | \r | |
17 | @param[in] Mode The pointer to the mode of SNP.\r | |
18 | \r | |
19 | @retval NULL If it failed to generate a client Id.\r | |
20 | @retval others The pointer to the new client id.\r | |
21 | \r | |
22 | **/\r | |
23 | EFI_DHCP6_DUID *\r | |
24 | Dhcp6GenerateClientId (\r | |
25 | IN EFI_SIMPLE_NETWORK_MODE *Mode\r | |
26 | )\r | |
27 | {\r | |
28 | EFI_STATUS Status;\r | |
29 | EFI_DHCP6_DUID *Duid;\r | |
30 | EFI_TIME Time;\r | |
31 | UINT32 Stamp;\r | |
33c09637 | 32 | EFI_GUID Uuid;\r |
33 | \r | |
a3bcde70 HT |
34 | \r |
35 | //\r | |
36 | // Attempt to get client Id from variable to keep it constant.\r | |
37 | // See details in section-9 of rfc-3315.\r | |
38 | //\r | |
f01b91ae | 39 | GetVariable2 (L"ClientId", &gEfiDhcp6ServiceBindingProtocolGuid, (VOID**)&Duid, NULL);\r |
a3bcde70 HT |
40 | if (Duid != NULL) {\r |
41 | return Duid;\r | |
42 | }\r | |
43 | \r | |
a3bcde70 HT |
44 | //\r |
45 | // The format of client identifier option:\r | |
46 | //\r | |
47 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
48 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
49 | // | OPTION_CLIENTID | option-len |\r | |
50 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
51 | // . .\r | |
52 | // . DUID .\r | |
53 | // . (variable length) .\r | |
54 | // . .\r | |
55 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
56 | //\r | |
a3bcde70 HT |
57 | \r |
58 | //\r | |
33c09637 | 59 | // If System UUID is found from SMBIOS Table, use DUID-UUID type.\r |
60 | //\r | |
03f9cc20 | 61 | if ((PcdGet8 (PcdDhcp6UidType) == Dhcp6DuidTypeUuid) && !EFI_ERROR (NetLibGetSystemGuid (&Uuid)) && !CompareGuid (&Uuid, &gZeroGuid)) {\r |
33c09637 | 62 | //\r |
63 | //\r | |
64 | // The format of DUID-UUID:\r | |
f75a7f56 | 65 | //\r |
33c09637 | 66 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r |
67 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
68 | // | DUID-Type (4) | UUID (128 bits) |\r | |
69 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |\r | |
70 | // | |\r | |
71 | // | |\r | |
72 | // | -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
73 | // | |\r | |
74 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-\r | |
75 | \r | |
76 | //\r | |
77 | // sizeof (option-len + Duid-type + UUID-size) = 20 bytes\r | |
78 | //\r | |
79 | Duid = AllocateZeroPool (2 + 2 + sizeof (EFI_GUID));\r | |
80 | if (Duid == NULL) {\r | |
81 | return NULL;\r | |
82 | }\r | |
83 | \r | |
84 | //\r | |
85 | // sizeof (Duid-type + UUID-size) = 18 bytes\r | |
86 | //\r | |
87 | Duid->Length = (UINT16) (18);\r | |
f75a7f56 | 88 | \r |
33c09637 | 89 | //\r |
90 | // Set the Duid-type and copy UUID.\r | |
91 | //\r | |
92 | WriteUnaligned16 ((UINT16 *) (Duid->Duid), HTONS (Dhcp6DuidTypeUuid));\r | |
f75a7f56 | 93 | \r |
33c09637 | 94 | CopyMem (Duid->Duid + 2, &Uuid, sizeof(EFI_GUID));\r |
95 | \r | |
96 | } else {\r | |
f75a7f56 | 97 | \r |
33c09637 | 98 | //\r |
99 | //\r | |
100 | // The format of DUID-LLT:\r | |
101 | //\r | |
102 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
103 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
104 | // | Duid type (1) | hardware type (16 bits) |\r | |
105 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
106 | // | time (32 bits) |\r | |
107 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
108 | // . .\r | |
109 | // . link-layer address (variable length) .\r | |
110 | // . .\r | |
111 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
112 | //\r | |
113 | \r | |
114 | //\r | |
115 | // Generate a time stamp of the seconds from 2000/1/1, assume 30day/month.\r | |
116 | //\r | |
117 | gRT->GetTime (&Time, NULL);\r | |
118 | Stamp = (UINT32)\r | |
119 | (\r | |
ddc6d41d | 120 | ((((UINT32)(Time.Year - 2000) * 360 + (Time.Month - 1) * 30 + (Time.Day - 1)) * 24 + Time.Hour) * 60 + Time.Minute) *\r |
33c09637 | 121 | 60 +\r |
122 | Time.Second\r | |
123 | );\r | |
124 | \r | |
125 | //\r | |
126 | // sizeof (option-len + Duid-type + hardware-type + time) = 10 bytes\r | |
127 | //\r | |
128 | Duid = AllocateZeroPool (10 + Mode->HwAddressSize);\r | |
129 | if (Duid == NULL) {\r | |
130 | return NULL;\r | |
131 | }\r | |
f75a7f56 | 132 | \r |
33c09637 | 133 | //\r |
134 | // sizeof (Duid-type + hardware-type + time) = 8 bytes\r | |
135 | //\r | |
136 | Duid->Length = (UINT16) (Mode->HwAddressSize + 8);\r | |
f75a7f56 | 137 | \r |
33c09637 | 138 | //\r |
139 | // Set the Duid-type, hardware-type, time and copy the hardware address.\r | |
140 | //\r | |
6da5153c FS |
141 | WriteUnaligned16 ((UINT16 *) ((UINT8 *) Duid + OFFSET_OF (EFI_DHCP6_DUID, Duid)), HTONS (Dhcp6DuidTypeLlt));\r |
142 | WriteUnaligned16 ((UINT16 *) ((UINT8 *) Duid + OFFSET_OF (EFI_DHCP6_DUID, Duid) + 2), HTONS (NET_IFTYPE_ETHERNET));\r | |
143 | WriteUnaligned32 ((UINT32 *) ((UINT8 *) Duid + OFFSET_OF (EFI_DHCP6_DUID, Duid) + 4), HTONL (Stamp));\r | |
393a3169 | 144 | \r |
33c09637 | 145 | CopyMem (Duid->Duid + 8, &Mode->CurrentAddress, Mode->HwAddressSize);\r |
a3bcde70 HT |
146 | }\r |
147 | \r | |
a3bcde70 HT |
148 | Status = gRT->SetVariable (\r |
149 | L"ClientId",\r | |
150 | &gEfiDhcp6ServiceBindingProtocolGuid,\r | |
151 | (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS),\r | |
152 | Duid->Length + 2,\r | |
153 | (VOID *) Duid\r | |
154 | );\r | |
9c12f2d7 FS |
155 | if (EFI_ERROR (Status)) {\r |
156 | FreePool (Duid);\r | |
157 | return NULL;\r | |
158 | }\r | |
a3bcde70 HT |
159 | \r |
160 | return Duid;\r | |
161 | }\r | |
162 | \r | |
163 | \r | |
164 | /**\r | |
165 | Copy the Dhcp6 configure data.\r | |
166 | \r | |
167 | @param[in] DstCfg The pointer to the destination configure data.\r | |
168 | @param[in] SorCfg The pointer to the source configure data.\r | |
169 | \r | |
170 | @retval EFI_SUCCESS Copy the content from SorCfg from DstCfg successfully.\r | |
171 | @retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated.\r | |
172 | \r | |
173 | **/\r | |
174 | EFI_STATUS\r | |
175 | Dhcp6CopyConfigData (\r | |
176 | IN EFI_DHCP6_CONFIG_DATA *DstCfg,\r | |
177 | IN EFI_DHCP6_CONFIG_DATA *SorCfg\r | |
178 | )\r | |
179 | {\r | |
180 | UINTN Index;\r | |
181 | UINTN OptionListSize;\r | |
182 | UINTN OptionSize;\r | |
183 | \r | |
184 | CopyMem (DstCfg, SorCfg, sizeof (EFI_DHCP6_CONFIG_DATA));\r | |
185 | \r | |
186 | //\r | |
187 | // Allocate another buffer for solicitretransmission, and copy it.\r | |
188 | //\r | |
189 | if (SorCfg->SolicitRetransmission != NULL) {\r | |
190 | \r | |
191 | DstCfg->SolicitRetransmission = AllocateZeroPool (sizeof (EFI_DHCP6_RETRANSMISSION));\r | |
192 | \r | |
193 | if (DstCfg->SolicitRetransmission == NULL) {\r | |
194 | //\r | |
195 | // Error will be handled out of this function.\r | |
196 | //\r | |
197 | return EFI_OUT_OF_RESOURCES;\r | |
198 | }\r | |
199 | \r | |
200 | CopyMem (\r | |
201 | DstCfg->SolicitRetransmission,\r | |
202 | SorCfg->SolicitRetransmission,\r | |
203 | sizeof (EFI_DHCP6_RETRANSMISSION)\r | |
204 | );\r | |
205 | }\r | |
206 | \r | |
207 | if (SorCfg->OptionList != NULL && SorCfg->OptionCount != 0) {\r | |
208 | \r | |
209 | OptionListSize = SorCfg->OptionCount * sizeof (EFI_DHCP6_PACKET_OPTION *);\r | |
210 | DstCfg->OptionList = AllocateZeroPool (OptionListSize);\r | |
211 | \r | |
212 | if (DstCfg->OptionList == NULL) {\r | |
213 | //\r | |
214 | // Error will be handled out of this function.\r | |
215 | //\r | |
216 | return EFI_OUT_OF_RESOURCES;\r | |
217 | }\r | |
218 | \r | |
219 | for (Index = 0; Index < SorCfg->OptionCount; Index++) {\r | |
220 | \r | |
221 | OptionSize = NTOHS (SorCfg->OptionList[Index]->OpLen) + 4;\r | |
222 | DstCfg->OptionList[Index] = AllocateZeroPool (OptionSize);\r | |
223 | \r | |
224 | if (DstCfg->OptionList[Index] == NULL) {\r | |
225 | //\r | |
226 | // Error will be handled out of this function.\r | |
227 | //\r | |
228 | return EFI_OUT_OF_RESOURCES;\r | |
229 | }\r | |
230 | \r | |
231 | CopyMem (\r | |
232 | DstCfg->OptionList[Index],\r | |
233 | SorCfg->OptionList[Index],\r | |
234 | OptionSize\r | |
235 | );\r | |
236 | }\r | |
237 | }\r | |
238 | \r | |
239 | return EFI_SUCCESS;\r | |
240 | }\r | |
241 | \r | |
242 | \r | |
243 | /**\r | |
244 | Clean up the configure data.\r | |
245 | \r | |
246 | @param[in, out] CfgData The pointer to the configure data.\r | |
247 | \r | |
248 | **/\r | |
249 | VOID\r | |
250 | Dhcp6CleanupConfigData (\r | |
251 | IN OUT EFI_DHCP6_CONFIG_DATA *CfgData\r | |
252 | )\r | |
253 | {\r | |
254 | UINTN Index;\r | |
255 | \r | |
256 | ASSERT (CfgData != NULL);\r | |
257 | //\r | |
258 | // Clean up all fields in config data including the reference buffers, but do\r | |
259 | // not free the config data buffer itself.\r | |
260 | //\r | |
261 | if (CfgData->OptionList != NULL) {\r | |
262 | for (Index = 0; Index < CfgData->OptionCount; Index++) {\r | |
263 | if (CfgData->OptionList[Index] != NULL) {\r | |
264 | FreePool (CfgData->OptionList[Index]);\r | |
265 | }\r | |
266 | }\r | |
267 | FreePool (CfgData->OptionList);\r | |
268 | }\r | |
269 | \r | |
270 | if (CfgData->SolicitRetransmission != NULL) {\r | |
271 | FreePool (CfgData->SolicitRetransmission);\r | |
272 | }\r | |
273 | \r | |
274 | ZeroMem (CfgData, sizeof (EFI_DHCP6_CONFIG_DATA));\r | |
275 | }\r | |
276 | \r | |
277 | \r | |
278 | /**\r | |
279 | Clean up the mode data.\r | |
280 | \r | |
281 | @param[in, out] ModeData The pointer to the mode data.\r | |
282 | \r | |
283 | **/\r | |
284 | VOID\r | |
285 | Dhcp6CleanupModeData (\r | |
286 | IN OUT EFI_DHCP6_MODE_DATA *ModeData\r | |
287 | )\r | |
288 | {\r | |
289 | ASSERT (ModeData != NULL);\r | |
290 | //\r | |
291 | // Clean up all fields in mode data including the reference buffers, but do\r | |
292 | // not free the mode data buffer itself.\r | |
293 | //\r | |
294 | if (ModeData->ClientId != NULL) {\r | |
295 | FreePool (ModeData->ClientId);\r | |
296 | }\r | |
297 | \r | |
298 | if (ModeData->Ia != NULL) {\r | |
299 | \r | |
300 | if (ModeData->Ia->ReplyPacket != NULL) {\r | |
301 | FreePool (ModeData->Ia->ReplyPacket);\r | |
302 | }\r | |
303 | FreePool (ModeData->Ia);\r | |
304 | }\r | |
305 | \r | |
306 | ZeroMem (ModeData, sizeof (EFI_DHCP6_MODE_DATA));\r | |
307 | }\r | |
308 | \r | |
309 | \r | |
310 | /**\r | |
311 | Calculate the expire time by the algorithm defined in rfc.\r | |
312 | \r | |
313 | @param[in] Base The base value of the time.\r | |
314 | @param[in] IsFirstRt If TRUE, it is the first time to calculate expire time.\r | |
f97117ba | 315 | @param[in] NeedSigned If TRUE, the signed factor is needed.\r |
a3bcde70 HT |
316 | \r |
317 | @return Expire The calculated result for the new expire time.\r | |
318 | \r | |
319 | **/\r | |
320 | UINT32\r | |
321 | Dhcp6CalculateExpireTime (\r | |
322 | IN UINT32 Base,\r | |
323 | IN BOOLEAN IsFirstRt,\r | |
324 | IN BOOLEAN NeedSigned\r | |
325 | )\r | |
326 | {\r | |
327 | EFI_TIME Time;\r | |
328 | BOOLEAN Signed;\r | |
329 | UINT32 Seed;\r | |
330 | UINT32 Expire;\r | |
331 | \r | |
332 | //\r | |
333 | // Take the 10bits of microsecond in system time as a uniform distribution.\r | |
334 | // Take the 10th bit as a flag to determine it's signed or not.\r | |
335 | //\r | |
336 | gRT->GetTime (&Time, NULL);\r | |
337 | Seed = ((Time.Nanosecond >> 10) & DHCP6_10_BIT_MASK);\r | |
338 | Signed = (BOOLEAN) ((((Time.Nanosecond >> 9) & 0x01) != 0) ? TRUE : FALSE);\r | |
339 | Signed = (BOOLEAN) (NeedSigned ? Signed : FALSE);\r | |
340 | \r | |
341 | //\r | |
342 | // Calculate expire by the following algo:\r | |
343 | // 1. base + base * (-0.1 ~ 0) for the first solicit\r | |
344 | // 2. base + base * (-0.1 ~ 0.1) for the first other messages\r | |
345 | // 3. 2 * base + base * (-0.1 ~ 0.1) for the subsequent all messages\r | |
346 | // 4. base + base * (-0.1 ~ 0) for the more than mrt timeout\r | |
347 | //\r | |
348 | // The (Seed / 0x3ff / 10) is used to a random range (0, 0.1).\r | |
349 | //\r | |
350 | if (IsFirstRt && Signed) {\r | |
351 | \r | |
352 | Expire = Base - (UINT32) (Base * Seed / DHCP6_10_BIT_MASK / 10);\r | |
353 | \r | |
354 | } else if (IsFirstRt && !Signed) {\r | |
355 | \r | |
356 | Expire = Base + (UINT32) (Base * Seed / DHCP6_10_BIT_MASK / 10);\r | |
357 | \r | |
358 | } else if (!IsFirstRt && Signed) {\r | |
359 | \r | |
360 | Expire = 2 * Base - (UINT32) (Base * Seed / DHCP6_10_BIT_MASK / 10);\r | |
361 | \r | |
362 | } else {\r | |
363 | \r | |
364 | Expire = 2 * Base + (UINT32) (Base * Seed / DHCP6_10_BIT_MASK / 10);\r | |
365 | }\r | |
366 | \r | |
367 | Expire = (Expire != 0) ? Expire : 1;\r | |
368 | \r | |
369 | return Expire;\r | |
370 | }\r | |
371 | \r | |
372 | \r | |
373 | /**\r | |
374 | Calculate the lease time by the algorithm defined in rfc.\r | |
375 | \r | |
376 | @param[in] IaCb The pointer to the Ia control block.\r | |
377 | \r | |
378 | **/\r | |
379 | VOID\r | |
380 | Dhcp6CalculateLeaseTime (\r | |
381 | IN DHCP6_IA_CB *IaCb\r | |
382 | )\r | |
383 | {\r | |
a3bcde70 HT |
384 | UINT32 MinLt;\r |
385 | UINT32 MaxLt;\r | |
386 | UINTN Index;\r | |
387 | \r | |
388 | ASSERT (IaCb->Ia->IaAddressCount > 0);\r | |
389 | \r | |
390 | MinLt = (UINT32) (-1);\r | |
391 | MaxLt = 0;\r | |
392 | \r | |
393 | //\r | |
394 | // Calculate minlt as min of all valid life time, and maxlt as max of all\r | |
395 | // valid life time.\r | |
396 | //\r | |
397 | for (Index = 0; Index < IaCb->Ia->IaAddressCount; Index++) {\r | |
c99106b7 FS |
398 | MinLt = MIN (MinLt, IaCb->Ia->IaAddress[Index].ValidLifetime);\r |
399 | MaxLt = MAX (MinLt, IaCb->Ia->IaAddress[Index].ValidLifetime);\r | |
a3bcde70 HT |
400 | }\r |
401 | \r | |
402 | //\r | |
403 | // Take 50% minlt as t1, and 80% maxlt as t2 if Dhcp6 server doesn't offer\r | |
404 | // such information.\r | |
405 | //\r | |
406 | IaCb->T1 = (IaCb->T1 != 0) ? IaCb->T1 : (UINT32)(MinLt * 5 / 10);\r | |
407 | IaCb->T2 = (IaCb->T2 != 0) ? IaCb->T2 : (UINT32)(MinLt * 8 / 10);\r | |
408 | IaCb->AllExpireTime = MaxLt;\r | |
409 | IaCb->LeaseTime = 0;\r | |
410 | }\r | |
411 | \r | |
412 | \r | |
413 | /**\r | |
414 | Check whether the addresses are all included by the configured Ia.\r | |
415 | \r | |
416 | @param[in] Ia The pointer to the Ia.\r | |
417 | @param[in] AddressCount The number of addresses.\r | |
418 | @param[in] Addresses The pointer to the addresses buffer.\r | |
419 | \r | |
420 | @retval EFI_SUCCESS The addresses are all included by the configured IA.\r | |
421 | @retval EFI_NOT_FOUND The addresses are not included by the configured IA.\r | |
422 | \r | |
423 | **/\r | |
424 | EFI_STATUS\r | |
425 | Dhcp6CheckAddress (\r | |
426 | IN EFI_DHCP6_IA *Ia,\r | |
427 | IN UINT32 AddressCount,\r | |
428 | IN EFI_IPv6_ADDRESS *Addresses\r | |
429 | )\r | |
430 | {\r | |
431 | UINTN Index1;\r | |
432 | UINTN Index2;\r | |
433 | BOOLEAN Found;\r | |
434 | \r | |
435 | //\r | |
436 | // Check whether the addresses are all included by the configured IA. And it\r | |
437 | // will return success if address count is zero, which means all addresses.\r | |
438 | //\r | |
439 | for (Index1 = 0; Index1 < AddressCount; Index1++) {\r | |
440 | \r | |
441 | Found = FALSE;\r | |
442 | \r | |
443 | for (Index2 = 0; Index2 < Ia->IaAddressCount; Index2++) {\r | |
444 | \r | |
445 | if (CompareMem (\r | |
446 | &Addresses[Index1],\r | |
447 | &Ia->IaAddress[Index2],\r | |
448 | sizeof (EFI_IPv6_ADDRESS)\r | |
449 | ) == 0) {\r | |
450 | \r | |
451 | Found = TRUE;\r | |
452 | break;\r | |
453 | }\r | |
454 | }\r | |
455 | \r | |
456 | if (!Found) {\r | |
457 | return EFI_NOT_FOUND;\r | |
458 | }\r | |
459 | }\r | |
460 | \r | |
461 | return EFI_SUCCESS;\r | |
462 | }\r | |
463 | \r | |
464 | \r | |
465 | /**\r | |
466 | Deprive the addresses from current Ia, and generate another eliminated Ia.\r | |
467 | \r | |
468 | @param[in] Ia The pointer to the Ia.\r | |
469 | @param[in] AddressCount The number of addresses.\r | |
470 | @param[in] Addresses The pointer to the addresses buffer.\r | |
471 | \r | |
472 | @retval NULL If it failed to generate the deprived Ia.\r | |
473 | @retval others The pointer to the deprived Ia.\r | |
474 | \r | |
475 | **/\r | |
476 | EFI_DHCP6_IA *\r | |
477 | Dhcp6DepriveAddress (\r | |
478 | IN EFI_DHCP6_IA *Ia,\r | |
479 | IN UINT32 AddressCount,\r | |
480 | IN EFI_IPv6_ADDRESS *Addresses\r | |
481 | )\r | |
482 | {\r | |
483 | EFI_DHCP6_IA *IaCopy;\r | |
484 | UINTN IaCopySize;\r | |
485 | UINTN Index1;\r | |
486 | UINTN Index2;\r | |
487 | BOOLEAN Found;\r | |
488 | \r | |
489 | if (AddressCount == 0) {\r | |
490 | //\r | |
491 | // It means release all Ia addresses if address count is zero.\r | |
492 | //\r | |
493 | AddressCount = Ia->IaAddressCount;\r | |
494 | }\r | |
495 | \r | |
496 | ASSERT (AddressCount != 0);\r | |
497 | \r | |
498 | IaCopySize = sizeof (EFI_DHCP6_IA) + (AddressCount - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
499 | IaCopy = AllocateZeroPool (IaCopySize);\r | |
500 | \r | |
501 | if (IaCopy == NULL) {\r | |
502 | return NULL;\r | |
503 | }\r | |
504 | \r | |
505 | if (AddressCount == Ia->IaAddressCount) {\r | |
506 | //\r | |
507 | // If release all Ia addresses, just copy the configured Ia and then set\r | |
508 | // its address count as zero.\r | |
f97117ba | 509 | // We may decline/release part of addresses at the beginning. So it's a\r |
a3bcde70 HT |
510 | // forwarding step to update address infor for decline/release, while the\r |
511 | // other infor such as Ia state will be updated when receiving reply.\r | |
512 | //\r | |
513 | CopyMem (IaCopy, Ia, IaCopySize);\r | |
514 | Ia->IaAddressCount = 0;\r | |
515 | return IaCopy;\r | |
516 | }\r | |
517 | \r | |
518 | CopyMem (IaCopy, Ia, sizeof (EFI_DHCP6_IA));\r | |
519 | \r | |
520 | //\r | |
521 | // Move the addresses from the Ia of instance to the deprived Ia.\r | |
522 | //\r | |
523 | for (Index1 = 0; Index1 < AddressCount; Index1++) {\r | |
524 | \r | |
525 | Found = FALSE;\r | |
526 | \r | |
527 | for (Index2 = 0; Index2 < Ia->IaAddressCount; Index2++) {\r | |
528 | \r | |
529 | if (CompareMem (\r | |
530 | &Addresses[Index1],\r | |
531 | &Ia->IaAddress[Index2],\r | |
532 | sizeof (EFI_IPv6_ADDRESS)\r | |
533 | ) == 0) {\r | |
534 | //\r | |
535 | // Copy the deprived address to the copy of Ia\r | |
536 | //\r | |
537 | CopyMem (\r | |
538 | &IaCopy->IaAddress[Index1],\r | |
539 | &Ia->IaAddress[Index2],\r | |
540 | sizeof (EFI_DHCP6_IA_ADDRESS)\r | |
541 | );\r | |
542 | //\r | |
543 | // Delete the deprived address from the instance Ia\r | |
544 | //\r | |
545 | if (Index2 + 1 < Ia->IaAddressCount) {\r | |
546 | CopyMem (\r | |
547 | &Ia->IaAddress[Index2],\r | |
548 | &Ia->IaAddress[Index2 + 1],\r | |
549 | (Ia->IaAddressCount - Index2 - 1) * sizeof (EFI_DHCP6_IA_ADDRESS)\r | |
550 | );\r | |
551 | }\r | |
552 | Found = TRUE;\r | |
553 | break;\r | |
554 | }\r | |
555 | }\r | |
556 | ASSERT (Found == TRUE);\r | |
557 | }\r | |
558 | \r | |
559 | Ia->IaAddressCount -= AddressCount;\r | |
560 | IaCopy->IaAddressCount = AddressCount;\r | |
561 | \r | |
562 | return IaCopy;\r | |
563 | }\r | |
564 | \r | |
565 | \r | |
566 | /**\r | |
567 | The dummy ext buffer free callback routine.\r | |
568 | \r | |
569 | @param[in] Arg The pointer to the parameter.\r | |
570 | \r | |
571 | **/\r | |
572 | VOID\r | |
573 | EFIAPI\r | |
574 | Dhcp6DummyExtFree (\r | |
575 | IN VOID *Arg\r | |
576 | )\r | |
577 | {\r | |
578 | }\r | |
579 | \r | |
580 | \r | |
581 | /**\r | |
582 | The callback routine once message transmitted.\r | |
583 | \r | |
76389e18 | 584 | @param[in] Wrap The pointer to the received net buffer.\r |
a3bcde70 HT |
585 | @param[in] EndPoint The pointer to the udp end point.\r |
586 | @param[in] IoStatus The return status from udp io.\r | |
587 | @param[in] Context The opaque parameter to the function.\r | |
588 | \r | |
589 | **/\r | |
590 | VOID\r | |
591 | EFIAPI\r | |
592 | Dhcp6OnTransmitted (\r | |
593 | IN NET_BUF *Wrap,\r | |
594 | IN UDP_END_POINT *EndPoint,\r | |
595 | IN EFI_STATUS IoStatus,\r | |
596 | IN VOID *Context\r | |
597 | )\r | |
598 | {\r | |
599 | NetbufFree (Wrap);\r | |
600 | }\r | |
601 | \r | |
602 | \r | |
603 | /**\r | |
604 | Append the option to Buf, and move Buf to the end.\r | |
605 | \r | |
606 | @param[in, out] Buf The pointer to the buffer.\r | |
607 | @param[in] OptType The option type.\r | |
608 | @param[in] OptLen The length of option contents.\r | |
609 | @param[in] Data The pointer to the option content.\r | |
610 | \r | |
611 | @return Buf The position to append the next option.\r | |
612 | \r | |
613 | **/\r | |
614 | UINT8 *\r | |
615 | Dhcp6AppendOption (\r | |
616 | IN OUT UINT8 *Buf,\r | |
617 | IN UINT16 OptType,\r | |
618 | IN UINT16 OptLen,\r | |
619 | IN UINT8 *Data\r | |
620 | )\r | |
621 | {\r | |
622 | //\r | |
623 | // The format of Dhcp6 option:\r | |
624 | //\r | |
625 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
626 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
627 | // | option-code | option-len (option data) |\r | |
628 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
629 | // | option-data |\r | |
630 | // | (option-len octets) |\r | |
631 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
632 | //\r | |
633 | \r | |
634 | ASSERT (OptLen != 0);\r | |
635 | \r | |
636 | WriteUnaligned16 ((UINT16 *) Buf, OptType);\r | |
637 | Buf += 2;\r | |
638 | WriteUnaligned16 ((UINT16 *) Buf, OptLen);\r | |
639 | Buf += 2;\r | |
640 | CopyMem (Buf, Data, NTOHS (OptLen));\r | |
641 | Buf += NTOHS (OptLen);\r | |
642 | \r | |
643 | return Buf;\r | |
644 | }\r | |
645 | \r | |
685e44a5 | 646 | /**\r |
647 | Append the appointed IA Address option to Buf, and move Buf to the end.\r | |
648 | \r | |
649 | @param[in, out] Buf The pointer to the position to append.\r | |
650 | @param[in] IaAddr The pointer to the IA Address.\r | |
651 | @param[in] MessageType Message type of DHCP6 package.\r | |
652 | \r | |
653 | @return Buf The position to append the next option.\r | |
654 | \r | |
655 | **/\r | |
656 | UINT8 *\r | |
657 | Dhcp6AppendIaAddrOption (\r | |
658 | IN OUT UINT8 *Buf,\r | |
659 | IN EFI_DHCP6_IA_ADDRESS *IaAddr,\r | |
660 | IN UINT32 MessageType\r | |
661 | )\r | |
662 | {\r | |
663 | \r | |
664 | // The format of the IA Address option is:\r | |
665 | //\r | |
666 | // 0 1 2 3\r | |
667 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
668 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
669 | // | OPTION_IAADDR | option-len |\r | |
670 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
671 | // | |\r | |
672 | // | IPv6 address |\r | |
673 | // | |\r | |
674 | // | |\r | |
675 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
676 | // | preferred-lifetime |\r | |
677 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
678 | // | valid-lifetime |\r | |
679 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
680 | // . .\r | |
681 | // . IAaddr-options .\r | |
682 | // . .\r | |
683 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
f75a7f56 | 684 | \r |
685e44a5 | 685 | //\r |
686 | // Fill the value of Ia Address option type\r | |
687 | //\r | |
688 | WriteUnaligned16 ((UINT16 *) Buf, HTONS (Dhcp6OptIaAddr));\r | |
689 | Buf += 2;\r | |
690 | \r | |
691 | WriteUnaligned16 ((UINT16 *) Buf, HTONS (sizeof (EFI_DHCP6_IA_ADDRESS)));\r | |
692 | Buf += 2;\r | |
693 | \r | |
694 | CopyMem (Buf, &IaAddr->IpAddress, sizeof(EFI_IPv6_ADDRESS));\r | |
695 | Buf += sizeof(EFI_IPv6_ADDRESS);\r | |
696 | \r | |
697 | //\r | |
698 | // Fill the value of preferred-lifetime and valid-lifetime.\r | |
699 | // According to RFC3315 Chapter 18.1.2, the preferred-lifetime and valid-lifetime fields\r | |
700 | // should set to 0 when initiate a Confirm message.\r | |
701 | //\r | |
702 | if (MessageType != Dhcp6MsgConfirm) {\r | |
703 | WriteUnaligned32 ((UINT32 *) Buf, HTONL (IaAddr->PreferredLifetime));\r | |
704 | }\r | |
705 | Buf += 4;\r | |
706 | \r | |
707 | if (MessageType != Dhcp6MsgConfirm) {\r | |
708 | WriteUnaligned32 ((UINT32 *) Buf, HTONL (IaAddr->ValidLifetime));\r | |
709 | }\r | |
710 | Buf += 4;\r | |
711 | \r | |
712 | return Buf;\r | |
713 | }\r | |
714 | \r | |
a3bcde70 HT |
715 | \r |
716 | /**\r | |
717 | Append the appointed Ia option to Buf, and move Buf to the end.\r | |
718 | \r | |
719 | @param[in, out] Buf The pointer to the position to append.\r | |
720 | @param[in] Ia The pointer to the Ia.\r | |
721 | @param[in] T1 The time of T1.\r | |
722 | @param[in] T2 The time of T2.\r | |
685e44a5 | 723 | @param[in] MessageType Message type of DHCP6 package.\r |
a3bcde70 HT |
724 | \r |
725 | @return Buf The position to append the next Ia option.\r | |
726 | \r | |
727 | **/\r | |
728 | UINT8 *\r | |
729 | Dhcp6AppendIaOption (\r | |
730 | IN OUT UINT8 *Buf,\r | |
731 | IN EFI_DHCP6_IA *Ia,\r | |
732 | IN UINT32 T1,\r | |
685e44a5 | 733 | IN UINT32 T2,\r |
734 | IN UINT32 MessageType\r | |
a3bcde70 HT |
735 | )\r |
736 | {\r | |
737 | UINT8 *AddrOpt;\r | |
738 | UINT16 *Len;\r | |
739 | UINTN Index;\r | |
a3bcde70 HT |
740 | \r |
741 | //\r | |
742 | // The format of IA_NA and IA_TA option:\r | |
743 | //\r | |
744 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
745 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
746 | // | OPTION_IA_NA | option-len |\r | |
747 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
748 | // | IAID (4 octets) |\r | |
749 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
750 | // | T1 (only for IA_NA) |\r | |
751 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
752 | // | T2 (only for IA_NA) |\r | |
753 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
754 | // | |\r | |
755 | // . IA_NA-options/IA_TA-options .\r | |
756 | // . .\r | |
757 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
758 | //\r | |
759 | \r | |
760 | //\r | |
761 | // Fill the value of Ia option type\r | |
762 | //\r | |
763 | WriteUnaligned16 ((UINT16 *) Buf, HTONS (Ia->Descriptor.Type));\r | |
764 | Buf += 2;\r | |
765 | \r | |
766 | //\r | |
767 | // Fill the len of Ia option later, keep the pointer first\r | |
768 | //\r | |
769 | Len = (UINT16 *) Buf;\r | |
770 | Buf += 2;\r | |
771 | \r | |
772 | //\r | |
773 | // Fill the value of iaid\r | |
774 | //\r | |
775 | WriteUnaligned32 ((UINT32 *) Buf, HTONL (Ia->Descriptor.IaId));\r | |
776 | Buf += 4;\r | |
777 | \r | |
778 | //\r | |
779 | // Fill the value of t1 and t2 if iana, keep it 0xffffffff if no specified.\r | |
780 | //\r | |
781 | if (Ia->Descriptor.Type == Dhcp6OptIana) {\r | |
685e44a5 | 782 | WriteUnaligned32 ((UINT32 *) Buf, HTONL ((T1 != 0) ? T1 : 0xffffffff));\r |
a3bcde70 | 783 | Buf += 4;\r |
685e44a5 | 784 | WriteUnaligned32 ((UINT32 *) Buf, HTONL ((T2 != 0) ? T2 : 0xffffffff));\r |
a3bcde70 HT |
785 | Buf += 4;\r |
786 | }\r | |
787 | \r | |
788 | //\r | |
789 | // Fill all the addresses belong to the Ia\r | |
790 | //\r | |
791 | for (Index = 0; Index < Ia->IaAddressCount; Index++) {\r | |
685e44a5 | 792 | AddrOpt = (UINT8 *) Ia->IaAddress + Index * sizeof (EFI_DHCP6_IA_ADDRESS);\r |
793 | Buf = Dhcp6AppendIaAddrOption (Buf, (EFI_DHCP6_IA_ADDRESS *) AddrOpt, MessageType);\r | |
a3bcde70 HT |
794 | }\r |
795 | \r | |
796 | //\r | |
797 | // Fill the value of Ia option length\r | |
798 | //\r | |
799 | *Len = HTONS ((UINT16) (Buf - (UINT8 *) Len - 2));\r | |
800 | \r | |
801 | return Buf;\r | |
802 | }\r | |
803 | \r | |
804 | /**\r | |
805 | Append the appointed Elapsed time option to Buf, and move Buf to the end.\r | |
806 | \r | |
807 | @param[in, out] Buf The pointer to the position to append.\r | |
808 | @param[in] Instance The pointer to the Dhcp6 instance.\r | |
809 | @param[out] Elapsed The pointer to the elapsed time value in\r | |
810 | the generated packet.\r | |
811 | \r | |
812 | @return Buf The position to append the next Ia option.\r | |
813 | \r | |
814 | **/\r | |
815 | UINT8 *\r | |
816 | Dhcp6AppendETOption (\r | |
817 | IN OUT UINT8 *Buf,\r | |
818 | IN DHCP6_INSTANCE *Instance,\r | |
819 | OUT UINT16 **Elapsed\r | |
820 | )\r | |
821 | {\r | |
822 | //\r | |
823 | // The format of elapsed time option:\r | |
824 | //\r | |
825 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
826 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
827 | // | OPTION_ELAPSED_TIME | option-len |\r | |
828 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
829 | // | elapsed-time |\r | |
830 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
831 | //\r | |
832 | \r | |
833 | //\r | |
834 | // Fill the value of elapsed-time option type.\r | |
835 | //\r | |
836 | WriteUnaligned16 ((UINT16 *) Buf, HTONS (Dhcp6OptElapsedTime));\r | |
837 | Buf += 2;\r | |
838 | \r | |
839 | //\r | |
840 | // Fill the len of elapsed-time option, which is fixed.\r | |
841 | //\r | |
842 | WriteUnaligned16 ((UINT16 *) Buf, HTONS(2));\r | |
843 | Buf += 2;\r | |
844 | \r | |
845 | //\r | |
846 | // Fill in elapsed time value with 0 value for now. The actual value is\r | |
847 | // filled in later just before the packet is transmitted.\r | |
848 | //\r | |
849 | WriteUnaligned16 ((UINT16 *) Buf, HTONS(0));\r | |
850 | *Elapsed = (UINT16 *) Buf;\r | |
851 | Buf += 2;\r | |
852 | \r | |
853 | return Buf;\r | |
854 | }\r | |
855 | \r | |
856 | /**\r | |
857 | Set the elapsed time based on the given instance and the pointer to the\r | |
858 | elapsed time option.\r | |
859 | \r | |
860 | @param[in] Elapsed The pointer to the position to append.\r | |
861 | @param[in] Instance The pointer to the Dhcp6 instance.\r | |
862 | \r | |
863 | **/\r | |
864 | VOID\r | |
865 | SetElapsedTime (\r | |
866 | IN UINT16 *Elapsed,\r | |
867 | IN DHCP6_INSTANCE *Instance\r | |
868 | )\r | |
869 | {\r | |
870 | EFI_TIME Time;\r | |
871 | UINT64 CurrentStamp;\r | |
872 | UINT64 ElapsedTimeValue;\r | |
873 | \r | |
874 | //\r | |
875 | // Generate a time stamp of the centiseconds from 2000/1/1, assume 30day/month.\r | |
876 | //\r | |
877 | gRT->GetTime (&Time, NULL);\r | |
ddc6d41d JW |
878 | CurrentStamp = MultU64x32 (\r |
879 | ((((UINT32)(Time.Year - 2000) * 360 + (Time.Month - 1) * 30 + (Time.Day - 1)) * 24 + Time.Hour) * 60 + Time.Minute) * 60 + Time.Second,\r | |
880 | 100\r | |
881 | ) +\r | |
882 | DivU64x32(\r | |
883 | Time.Nanosecond,\r | |
884 | 10000000\r | |
885 | );\r | |
a3bcde70 HT |
886 | \r |
887 | //\r | |
888 | // Sentinel value of 0 means that this is the first DHCP packet that we are\r | |
685e44a5 | 889 | // sending and that we need to initialize the value. First DHCP message\r |
a3bcde70 HT |
890 | // gets 0 elapsed-time. Otherwise, calculate based on StartTime.\r |
891 | //\r | |
892 | if (Instance->StartTime == 0) {\r | |
893 | ElapsedTimeValue = 0;\r | |
894 | Instance->StartTime = CurrentStamp;\r | |
895 | } else {\r | |
896 | ElapsedTimeValue = CurrentStamp - Instance->StartTime;\r | |
897 | \r | |
898 | //\r | |
899 | // If elapsed time cannot fit in two bytes, set it to 0xffff.\r | |
900 | //\r | |
901 | if (ElapsedTimeValue > 0xffff) {\r | |
902 | ElapsedTimeValue = 0xffff;\r | |
903 | }\r | |
904 | }\r | |
905 | WriteUnaligned16 (Elapsed, HTONS((UINT16) ElapsedTimeValue));\r | |
906 | }\r | |
907 | \r | |
908 | \r | |
909 | /**\r | |
910 | Seek the address of the first byte of the option header.\r | |
911 | \r | |
912 | @param[in] Buf The pointer to the buffer.\r | |
913 | @param[in] SeekLen The length to seek.\r | |
914 | @param[in] OptType The option type.\r | |
915 | \r | |
916 | @retval NULL If it failed to seek the option.\r | |
917 | @retval others The position to the option.\r | |
918 | \r | |
919 | **/\r | |
920 | UINT8 *\r | |
921 | Dhcp6SeekOption (\r | |
922 | IN UINT8 *Buf,\r | |
923 | IN UINT32 SeekLen,\r | |
924 | IN UINT16 OptType\r | |
925 | )\r | |
926 | {\r | |
927 | UINT8 *Cursor;\r | |
928 | UINT8 *Option;\r | |
929 | UINT16 DataLen;\r | |
930 | UINT16 OpCode;\r | |
931 | \r | |
932 | Option = NULL;\r | |
933 | Cursor = Buf;\r | |
934 | \r | |
935 | //\r | |
936 | // The format of Dhcp6 option refers to Dhcp6AppendOption().\r | |
937 | //\r | |
938 | while (Cursor < Buf + SeekLen) {\r | |
939 | OpCode = ReadUnaligned16 ((UINT16 *) Cursor);\r | |
940 | if (OpCode == HTONS (OptType)) {\r | |
941 | Option = Cursor;\r | |
942 | break;\r | |
943 | }\r | |
944 | DataLen = NTOHS (ReadUnaligned16 ((UINT16 *) (Cursor + 2)));\r | |
945 | Cursor += (DataLen + 4);\r | |
946 | }\r | |
947 | \r | |
948 | return Option;\r | |
949 | }\r | |
950 | \r | |
951 | \r | |
952 | /**\r | |
953 | Seek the address of the first byte of the Ia option header.\r | |
954 | \r | |
955 | @param[in] Buf The pointer to the buffer.\r | |
956 | @param[in] SeekLen The length to seek.\r | |
957 | @param[in] IaDesc The pointer to the Ia descriptor.\r | |
958 | \r | |
959 | @retval NULL If it failed to seek the Ia option.\r | |
960 | @retval others The position to the Ia option.\r | |
961 | \r | |
962 | **/\r | |
963 | UINT8 *\r | |
964 | Dhcp6SeekIaOption (\r | |
965 | IN UINT8 *Buf,\r | |
966 | IN UINT32 SeekLen,\r | |
967 | IN EFI_DHCP6_IA_DESCRIPTOR *IaDesc\r | |
968 | )\r | |
969 | {\r | |
970 | UINT8 *Cursor;\r | |
971 | UINT8 *Option;\r | |
972 | UINT16 DataLen;\r | |
973 | UINT16 OpCode;\r | |
974 | UINT32 IaId;\r | |
975 | \r | |
976 | //\r | |
977 | // The format of IA_NA and IA_TA option refers to Dhcp6AppendIaOption().\r | |
978 | //\r | |
979 | Option = NULL;\r | |
980 | Cursor = Buf;\r | |
981 | \r | |
982 | while (Cursor < Buf + SeekLen) {\r | |
983 | OpCode = ReadUnaligned16 ((UINT16 *) Cursor);\r | |
984 | IaId = ReadUnaligned32 ((UINT32 *) (Cursor + 4));\r | |
985 | if (OpCode == HTONS (IaDesc->Type) && IaId == HTONL (IaDesc->IaId)) {\r | |
986 | Option = Cursor;\r | |
987 | break;\r | |
988 | }\r | |
989 | DataLen = NTOHS (ReadUnaligned16 ((UINT16 *) (Cursor + 2)));\r | |
990 | Cursor += (DataLen + 4);\r | |
991 | }\r | |
992 | \r | |
993 | return Option;\r | |
994 | }\r | |
995 | \r | |
685e44a5 | 996 | /**\r |
f75a7f56 | 997 | Check whether the incoming IPv6 address in IaAddr is one of the maintained\r |
f97117ba | 998 | addresses in the IA control block.\r |
685e44a5 | 999 | \r |
1000 | @param[in] IaAddr The pointer to the IA Address to be checked.\r | |
1001 | @param[in] CurrentIa The pointer to the IA in IA control block.\r | |
1002 | \r | |
1003 | @retval TRUE Yes, this Address is already in IA control block.\r | |
1004 | @retval FALSE No, this Address is NOT in IA control block.\r | |
1005 | \r | |
1006 | **/\r | |
1007 | BOOLEAN\r | |
1008 | Dhcp6AddrIsInCurrentIa (\r | |
1009 | IN EFI_DHCP6_IA_ADDRESS *IaAddr,\r | |
1010 | IN EFI_DHCP6_IA *CurrentIa\r | |
1011 | )\r | |
1012 | {\r | |
1013 | UINT32 Index;\r | |
1014 | \r | |
1015 | ASSERT (IaAddr != NULL && CurrentIa != NULL);\r | |
f75a7f56 | 1016 | \r |
685e44a5 | 1017 | for (Index = 0; Index < CurrentIa->IaAddressCount; Index++) {\r |
1018 | if (EFI_IP6_EQUAL(&IaAddr->IpAddress, &CurrentIa->IaAddress[Index].IpAddress)) {\r | |
1019 | return TRUE;\r | |
1020 | }\r | |
1021 | }\r | |
1022 | return FALSE;\r | |
1023 | }\r | |
a3bcde70 HT |
1024 | \r |
1025 | /**\r | |
f97117ba | 1026 | Parse the address option and update the address information.\r |
a3bcde70 | 1027 | \r |
f97117ba | 1028 | @param[in] CurrentIa The pointer to the Ia Address in control block.\r |
a3bcde70 HT |
1029 | @param[in] IaInnerOpt The pointer to the buffer.\r |
1030 | @param[in] IaInnerLen The length to parse.\r | |
1031 | @param[out] AddrNum The number of addresses.\r | |
1032 | @param[in, out] AddrBuf The pointer to the address buffer.\r | |
1033 | \r | |
1034 | **/\r | |
1035 | VOID\r | |
1036 | Dhcp6ParseAddrOption (\r | |
685e44a5 | 1037 | IN EFI_DHCP6_IA *CurrentIa,\r |
a3bcde70 HT |
1038 | IN UINT8 *IaInnerOpt,\r |
1039 | IN UINT16 IaInnerLen,\r | |
1040 | OUT UINT32 *AddrNum,\r | |
1041 | IN OUT EFI_DHCP6_IA_ADDRESS *AddrBuf\r | |
1042 | )\r | |
1043 | {\r | |
1044 | UINT8 *Cursor;\r | |
1045 | UINT16 DataLen;\r | |
1046 | UINT16 OpCode;\r | |
1047 | UINT32 ValidLt;\r | |
685e44a5 | 1048 | UINT32 PreferredLt;\r |
1049 | EFI_DHCP6_IA_ADDRESS *IaAddr;\r | |
a3bcde70 HT |
1050 | \r |
1051 | //\r | |
1052 | // The format of the IA Address option:\r | |
1053 | //\r | |
1054 | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\r | |
1055 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
1056 | // | OPTION_IAADDR | option-len |\r | |
1057 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
1058 | // | |\r | |
1059 | // | IPv6 address |\r | |
1060 | // | |\r | |
1061 | // | |\r | |
1062 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
1063 | // | preferred-lifetime |\r | |
1064 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
1065 | // | valid-lifetime |\r | |
1066 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
1067 | // . .\r | |
1068 | // . IAaddr-options .\r | |
1069 | // . .\r | |
1070 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\r | |
1071 | //\r | |
1072 | \r | |
1073 | //\r | |
1074 | // Two usage model:\r | |
1075 | //\r | |
1076 | // 1. Pass addrbuf == null, to get the addrnum over the Ia inner options.\r | |
1077 | // 2. Pass addrbuf != null, to resolve the addresses over the Ia inner\r | |
1078 | // options to the addrbuf.\r | |
1079 | //\r | |
1080 | \r | |
1081 | Cursor = IaInnerOpt;\r | |
1082 | *AddrNum = 0;\r | |
1083 | \r | |
1084 | while (Cursor < IaInnerOpt + IaInnerLen) {\r | |
1085 | //\r | |
685e44a5 | 1086 | // Refer to RFC3315 Chapter 18.1.8, we need to update lifetimes for any addresses in the IA option\r |
1087 | // that the client already has recorded in the IA, and discard the Ia address option with 0 valid time.\r | |
a3bcde70 HT |
1088 | //\r |
1089 | OpCode = ReadUnaligned16 ((UINT16 *) Cursor);\r | |
685e44a5 | 1090 | PreferredLt = NTOHL (ReadUnaligned32 ((UINT32 *) (Cursor + 20)));\r |
1091 | ValidLt = NTOHL (ReadUnaligned32 ((UINT32 *) (Cursor + 24)));\r | |
1092 | IaAddr = (EFI_DHCP6_IA_ADDRESS *) (Cursor + 4);\r | |
1093 | if (OpCode == HTONS (Dhcp6OptIaAddr) && ValidLt >= PreferredLt &&\r | |
1094 | (Dhcp6AddrIsInCurrentIa(IaAddr, CurrentIa) || ValidLt !=0)) {\r | |
a3bcde70 | 1095 | if (AddrBuf != NULL) {\r |
685e44a5 | 1096 | CopyMem (AddrBuf, IaAddr, sizeof (EFI_DHCP6_IA_ADDRESS));\r |
1097 | AddrBuf->PreferredLifetime = PreferredLt;\r | |
1098 | AddrBuf->ValidLifetime = ValidLt;\r | |
a3bcde70 HT |
1099 | AddrBuf = (EFI_DHCP6_IA_ADDRESS *) ((UINT8 *) AddrBuf + sizeof (EFI_DHCP6_IA_ADDRESS));\r |
1100 | }\r | |
a3bcde70 HT |
1101 | (*AddrNum)++;\r |
1102 | }\r | |
1103 | DataLen = NTOHS (ReadUnaligned16 ((UINT16 *) (Cursor + 2)));\r | |
1104 | Cursor += (DataLen + 4);\r | |
1105 | }\r | |
1106 | }\r | |
1107 | \r | |
1108 | \r | |
1109 | /**\r | |
f97117ba | 1110 | Create a control block for the Ia according to the corresponding options.\r |
a3bcde70 HT |
1111 | \r |
1112 | @param[in] Instance The pointer to DHCP6 Instance.\r | |
1113 | @param[in] IaInnerOpt The pointer to the inner options in the Ia option.\r | |
1114 | @param[in] IaInnerLen The length of all the inner options in the Ia option.\r | |
1115 | @param[in] T1 T1 time in the Ia option.\r | |
1116 | @param[in] T2 T2 time in the Ia option.\r | |
1117 | \r | |
1118 | @retval EFI_NOT_FOUND No valid IA option is found.\r | |
1119 | @retval EFI_SUCCESS Create an IA control block successfully.\r | |
1120 | @retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated.\r | |
685e44a5 | 1121 | @retval EFI_DEVICE_ERROR An unexpected error.\r |
a3bcde70 HT |
1122 | \r |
1123 | **/\r | |
1124 | EFI_STATUS\r | |
1125 | Dhcp6GenerateIaCb (\r | |
1126 | IN DHCP6_INSTANCE *Instance,\r | |
1127 | IN UINT8 *IaInnerOpt,\r | |
1128 | IN UINT16 IaInnerLen,\r | |
1129 | IN UINT32 T1,\r | |
1130 | IN UINT32 T2\r | |
1131 | )\r | |
1132 | {\r | |
1133 | UINT32 AddrNum;\r | |
1134 | UINT32 IaSize;\r | |
1135 | EFI_DHCP6_IA *Ia;\r | |
1136 | \r | |
1137 | if (Instance->IaCb.Ia == NULL) {\r | |
685e44a5 | 1138 | return EFI_DEVICE_ERROR;\r |
a3bcde70 HT |
1139 | }\r |
1140 | \r | |
1141 | //\r | |
1142 | // Calculate the number of addresses for this Ia, excluding the addresses with\r | |
1143 | // the value 0 of valid lifetime.\r | |
1144 | //\r | |
685e44a5 | 1145 | Dhcp6ParseAddrOption (Instance->IaCb.Ia, IaInnerOpt, IaInnerLen, &AddrNum, NULL);\r |
a3bcde70 HT |
1146 | \r |
1147 | if (AddrNum == 0) {\r | |
1148 | return EFI_NOT_FOUND;\r | |
1149 | }\r | |
1150 | \r | |
1151 | //\r | |
1152 | // Allocate for new IA.\r | |
1153 | //\r | |
1154 | IaSize = sizeof (EFI_DHCP6_IA) + (AddrNum - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
1155 | Ia = AllocateZeroPool (IaSize);\r | |
1156 | \r | |
1157 | if (Ia == NULL) {\r | |
1158 | return EFI_OUT_OF_RESOURCES;\r | |
1159 | }\r | |
1160 | \r | |
1161 | //\r | |
1162 | // Fill up this new IA fields.\r | |
1163 | //\r | |
1164 | Ia->State = Instance->IaCb.Ia->State;\r | |
1165 | Ia->IaAddressCount = AddrNum;\r | |
1166 | CopyMem (&Ia->Descriptor, &Instance->Config->IaDescriptor, sizeof (EFI_DHCP6_IA_DESCRIPTOR));\r | |
685e44a5 | 1167 | Dhcp6ParseAddrOption (Instance->IaCb.Ia, IaInnerOpt, IaInnerLen, &AddrNum, Ia->IaAddress);\r |
a3bcde70 HT |
1168 | \r |
1169 | //\r | |
1170 | // Free original IA resource.\r | |
1171 | //\r | |
1172 | if (Instance->IaCb.Ia->ReplyPacket != NULL) {\r | |
1173 | FreePool (Instance->IaCb.Ia->ReplyPacket);\r | |
1174 | }\r | |
1175 | FreePool (Instance->IaCb.Ia);\r | |
1176 | \r | |
1177 | \r | |
1178 | ZeroMem (&Instance->IaCb, sizeof (DHCP6_IA_CB));\r | |
1179 | \r | |
1180 | //\r | |
1181 | // Update IaCb to use new IA.\r | |
1182 | //\r | |
1183 | Instance->IaCb.Ia = Ia;\r | |
1184 | \r | |
1185 | //\r | |
1186 | \r | |
1187 | // Fill in IaCb fields. Such as T1, T2, AllExpireTime and LeaseTime.\r | |
1188 | //\r | |
1189 | Instance->IaCb.T1 = T1;\r | |
1190 | Instance->IaCb.T2 = T2;\r | |
1191 | Dhcp6CalculateLeaseTime (&Instance->IaCb);\r | |
1192 | \r | |
1193 | return EFI_SUCCESS;\r | |
1194 | }\r | |
1195 | \r | |
1196 | \r | |
1197 | /**\r | |
1198 | Cache the current IA configuration information.\r | |
1199 | \r | |
1200 | @param[in] Instance The pointer to DHCP6 Instance.\r | |
1201 | \r | |
1202 | @retval EFI_SUCCESS Cache the current IA successfully.\r | |
1203 | @retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated.\r | |
1204 | \r | |
1205 | **/\r | |
1206 | EFI_STATUS\r | |
1207 | Dhcp6CacheIa (\r | |
1208 | IN DHCP6_INSTANCE *Instance\r | |
1209 | )\r | |
1210 | {\r | |
1211 | UINTN IaSize;\r | |
1212 | EFI_DHCP6_IA *Ia;\r | |
1213 | \r | |
1214 | Ia = Instance->IaCb.Ia;\r | |
1215 | \r | |
1216 | if ((Instance->CacheIa == NULL) && (Ia != NULL)) {\r | |
1217 | //\r | |
1218 | // Cache the current IA.\r | |
1219 | //\r | |
1220 | IaSize = sizeof (EFI_DHCP6_IA) + (Ia->IaAddressCount - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
1221 | \r | |
1222 | Instance->CacheIa = AllocateZeroPool (IaSize);\r | |
1223 | if (Instance->CacheIa == NULL) {\r | |
1224 | return EFI_OUT_OF_RESOURCES;\r | |
1225 | }\r | |
1226 | CopyMem (Instance->CacheIa, Ia, IaSize);\r | |
1227 | }\r | |
1228 | return EFI_SUCCESS;\r | |
1229 | }\r | |
1230 | \r | |
1231 | /**\r | |
f97117ba | 1232 | Append CacheIa to the current IA. Meanwhile, clear CacheIa.ValidLifetime to 0.\r |
a3bcde70 HT |
1233 | \r |
1234 | @param[in] Instance The pointer to DHCP6 instance.\r | |
1235 | \r | |
1236 | **/\r | |
1237 | VOID\r | |
1238 | Dhcp6AppendCacheIa (\r | |
1239 | IN DHCP6_INSTANCE *Instance\r | |
1240 | )\r | |
1241 | {\r | |
1242 | UINT8 *Ptr;\r | |
1243 | UINTN Index;\r | |
1244 | UINTN IaSize;\r | |
1245 | UINTN NewIaSize;\r | |
1246 | EFI_DHCP6_IA *Ia;\r | |
1247 | EFI_DHCP6_IA *NewIa;\r | |
1248 | EFI_DHCP6_IA *CacheIa;\r | |
1249 | \r | |
1250 | Ia = Instance->IaCb.Ia;\r | |
1251 | CacheIa = Instance->CacheIa;\r | |
1252 | \r | |
1253 | if ((CacheIa != NULL) && (CacheIa->IaAddressCount != 0)) {\r | |
1254 | //\r | |
1255 | // There are old addresses existing. Merge with current addresses.\r | |
1256 | //\r | |
1257 | NewIaSize = sizeof (EFI_DHCP6_IA) + (Ia->IaAddressCount + CacheIa->IaAddressCount - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
1258 | NewIa = AllocateZeroPool (NewIaSize);\r | |
1259 | if (NewIa == NULL) {\r | |
1260 | return;\r | |
1261 | }\r | |
1262 | \r | |
1263 | IaSize = sizeof (EFI_DHCP6_IA) + (Ia->IaAddressCount - 1) * sizeof (EFI_DHCP6_IA_ADDRESS);\r | |
1264 | CopyMem (NewIa, Ia, IaSize);\r | |
1265 | \r | |
1266 | //\r | |
1267 | // Clear old address.ValidLifetime\r | |
1268 | //\r | |
1269 | for (Index = 0; Index < CacheIa->IaAddressCount; Index++) {\r | |
1270 | CacheIa->IaAddress[Index].ValidLifetime = 0;\r | |
1271 | }\r | |
1272 | \r | |
1273 | NewIa->IaAddressCount += CacheIa->IaAddressCount;\r | |
1274 | Ptr = (UINT8*)&NewIa->IaAddress[Ia->IaAddressCount];\r | |
1275 | CopyMem (Ptr, CacheIa->IaAddress, CacheIa->IaAddressCount * sizeof (EFI_DHCP6_IA_ADDRESS));\r | |
1276 | \r | |
1277 | //\r | |
1278 | // Migrate to the NewIa and free previous.\r | |
1279 | //\r | |
1280 | FreePool (Instance->CacheIa);\r | |
1281 | FreePool (Instance->IaCb.Ia);\r | |
1282 | Instance->CacheIa = NULL;\r | |
1283 | Instance->IaCb.Ia = NewIa;\r | |
1284 | }\r | |
1285 | }\r | |
cc658224 | 1286 | \r |
1287 | /**\r | |
f97117ba | 1288 | Calculate the Dhcp6 get mapping timeout by adding additional delay to the IP6 DAD transmits count.\r |
cc658224 | 1289 | \r |
1290 | @param[in] Ip6Cfg The pointer to Ip6 config protocol.\r | |
1291 | @param[out] TimeOut The time out value in 100ns units.\r | |
1292 | \r | |
1293 | @retval EFI_INVALID_PARAMETER Input parameters are invalid.\r | |
1294 | @retval EFI_SUCCESS Calculate the time out value successfully.\r | |
1295 | **/\r | |
1296 | EFI_STATUS\r | |
1297 | Dhcp6GetMappingTimeOut (\r | |
1298 | IN EFI_IP6_CONFIG_PROTOCOL *Ip6Cfg,\r | |
1299 | OUT UINTN *TimeOut\r | |
f75a7f56 | 1300 | )\r |
cc658224 | 1301 | {\r |
1302 | EFI_STATUS Status;\r | |
1303 | UINTN DataSize;\r | |
1304 | EFI_IP6_CONFIG_DUP_ADDR_DETECT_TRANSMITS DadXmits;\r | |
1305 | \r | |
1306 | if (Ip6Cfg == NULL || TimeOut == NULL) {\r | |
1307 | return EFI_INVALID_PARAMETER;\r | |
1308 | }\r | |
1309 | \r | |
1310 | DataSize = sizeof (EFI_IP6_CONFIG_DUP_ADDR_DETECT_TRANSMITS);\r | |
1311 | Status = Ip6Cfg->GetData (\r | |
1312 | Ip6Cfg,\r | |
1313 | Ip6ConfigDataTypeDupAddrDetectTransmits,\r | |
1314 | &DataSize,\r | |
1315 | &DadXmits\r | |
1316 | );\r | |
1317 | if (EFI_ERROR (Status)) {\r | |
1318 | return Status;\r | |
1319 | }\r | |
f75a7f56 | 1320 | \r |
cc658224 | 1321 | *TimeOut = TICKS_PER_SECOND * DadXmits.DupAddrDetectTransmits + DHCP6_DAD_ADDITIONAL_DELAY;\r |
f75a7f56 | 1322 | \r |
cc658224 | 1323 | return EFI_SUCCESS;\r |
1324 | }\r |